Interlocking angle joint for door and window trims



March 27, 1928. 1,663,968 a H. H. BECKANSTIN INTERLOCKING ANGLE JQINT FOR DOOR AND WINDCW TRIMS Filed May 29. 1926 bow/Ky f5.

Patented Mar. 27, 1928.

UNITED STATES HARRY H. BECKANSTIN, OF HARTFORD, CONNECTICUT.

IN'lERLOCKING ANGLE JOINT FOR- DOOR ANDXVINDOW TRIMS.

Application filed May 29,

This invention relates to a mitre joint for door and window trims. It has been the practice, particularly in door'and window trims of thecheaper sort, to merely mitrc the sections or pieces without providing interlocking means therebetween. This practice is objectionable in that, in setting up the trim, it is difficult to make a close joint and, after the trim has been set up, the sections are apt to pull apart. It is also the practice, particularly in trims of the more expensive sort, to provide interlocking joints between the sections, but these old joints, which are more or less expensive, have been of such sort that they must be made at the mill and the sections assembled and shipped outin assembled position.

The aim of the present invention to pro vide an improved interlocking angle joint for door and window trims which avoids the above and other objections incident to mitre joints now generally employed.

More particularly, the aim of the invention is to provide an improved initre joint which is very simple in construction; which may be cheaply made; which forms a very close and tight union in which the interlocking members are concealed; which securely locks and holds the parts together so that a neat joint is maintained; which will permit of the sections being made at the mill or tactory and carried in stock so that, upon order, the individual sections may be shipped to the job; and which may be very readily assembled on the job.

My improved arrangement is such that the parts may be assembled on the job with the assurance that the sections will properly meet forming neat joints, and any likelihood of the parts spreading being avoided.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the appended olaiins.

In the accompanying drawings, wherein I have shown, for illustrative purposes, one embodiment which the present invention may take:

Figure 1 is a front View of a joint made in accordance with the present invention, one

1926. Serial No. 112,706.

of the sections, in the present instance the side section or casing, being partly broken away; a v

Fig. 2 is a rear view o'f'the joint with a portion of the'head section or casing broken away;

Fig. 3 'is across sectional'view taken on line 33 of Fig. 1; I

Fig. at is a similar view taken online 14 of Fig. 1; and

' Fig. 5 is a perspective View of the two sections, the side section being overturned sons to show the rear taco thereof;

Referring to the drawings in detail,A and B designate the two sections of the trim; in the present instance the section A being the head casing and the section B the side casing, although the position obviously could be reversed. These sections, by preference, comprise lat boards having suitable mouldingon their front faces, and the sec tions are disposed in the same (i. e. vertical) plane with their lengths at right angles to each other.

trated. 7 I y One 01 the sections, in the present instance the scetion 'A, is recessed or rabbeted at the forward corner of its mitred edge, as at 10, so as to provide a flange '11 of less thickness than that of the section A. This flange is provided, at its outer end, with mortises 12 and intervening tenons 13, the mortises increasing in width as they proceed away from the free edge of the flange, and the tenons decreasing in width as they proceed away from the free edge. The mortises are preferably shorterthan the flange.

The end of the section B is recessed at its rear edge so as to provide a lap or ledge 14: which, in thickness, corresponds to the depth of the rabbet or recess 10 of the section A. Inwardly of the lap 14, the rear face of the section B is provided with mortises 16 and tenons 17. The tenons 17 are of a thickness corresponding to the thickness of the flange 11. The tenons 13 correspond in shape, size and location to the mortises 16, and the tenons 17 similarly correspond to the-mortises 12, so that when the sections are assembled, the sets of tenons interlock and prevent the sections from being moved apart. The recess or rabbet in the end of the member B terminates short of the inner corner of this member, thus leaving a portion 18 of original thickness.

The ends of the boards are mitred at corresponding angles, as illus" It will be seen, from the drawings, that when the parts are assembled, the tenons 13' and 17 interlock, and the lap 14 engages in the rabbet or recess 10. Thus, the interlocking tenons are concealed from view, the only evidence of a joint which can be observed, when looking at the casing from the front, being the meeting of the mitred edges, as shown in Fig. 1. The sections may be prepared: atthe factory or mill and kept in stock and, upon order, sent out to the job where they can be very easily assembled without using any skill and with the assurance that the joint will be a true and neat one. After the trim is in place, the sections will be held in proper relation to one another by the interlocking joint. Obviously, the sections may be assembled at the mill, if desired, and

' the invention is generally applicable for interior trim purposes.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limit ing sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

I claim as my invention:

1. Trim for doors and windows comprising a head section, and a side section, said sections having their ends mitred for abutting relation to determine the angular relation between said sections, the mitred ends having abutting faces extending from the outer side of the trim to a depth substantially equal to one-half of the thickness of the sections, one of said sections having an extension at its inner side and the other section having a recess at its inner side for receiving the extension, said sections having upon the extension and in the recess interlocking means extending throughout substantially the entire width of the abutting faces of the sections. f

2. Trim for doors and windows comprising a head section, and a side section, said sections having their abutting ends mitred to dispose the sections at the desiredangle one to the other, the mitred ends of said sections having abutting faces extending throughout substantially the width of the meeting ends and being of a depth less than the thickness of the sections, one of said sections having at its inner side'an extension arranged to overlap the joint between said, abutting faces and provided with'mortises and tenons along its free edge portion, the

other section having a recess at its inner side with the abutting faces thereof in surface.

contact throughout the entire width'of the sections.

, HARRY n. BECKANSTIN. 

